Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1978-07-03
1980-01-29
Konopka, P. E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
75 05AB, 75 05BB, 75172R, 75172E, 2524253, 252460, 252466PT, 252472, 429 40, 429 44, B01J 2100, B01J 2112, B01J 2118, B01J 2340
Patent
active
041861108
ABSTRACT:
Finely divided noble metal-refractory metal alloys and methods for making them are disclosed. As catalysts these alloys have greater activity than a catalyst of the same unalloyed noble metal and may be advantageously used as electrodes for fuel cells particularly when supported. The method for making supported catalysts involves a simple and inexpensive procedure for converting a supported, finely divided noble metal catalyst to the desired alloy. In a preferred embodiment the process includes intimately contacting the supported noble metal catalyst with a finely divided refractory metal oxide, the metallic component of which is capable of enhancing the activity of the catalyst when alloyed therewith, and then heating to a sufficiently high temperature, preferably in a reducing atmosphere, to reduce the oxide and simultaneously form a finely divided, supported alloy of the noble metal and the metallic component of the oxide.
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Jalan Vinod M.
Landsman Douglas A.
Konopka P. E.
Revis Stephen E.
United Technologies Corporation
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